Multiphase Flow in Complex Fracture Apertures under a Wide Range of Flow Conditions
- PI; Massachusetts Institute of Technology
A better understanding of multiphase flow through fractures requires knowledge of the detailed physics of interfacial flows at the microscopic pore scale. The objective of our project was to develop tools for the simulation of such phenomena. Complementary work was performed by a group led by Dr.~Paul Meakin of the Idaho National Engineering and Environmental Laboratory. Our focus was on the lattice-Boltzmann (LB) method. In particular, we studied both the statics and dynamics of contact lines where two fluids (wetting and non-wetting) meet solid boundaries. Previous work had noted deficiencies in the way LB methods simulate such interfaces. Our work resulted in significant algorithmic improvements that alleviated these deficiencies. As a result, we were able to study in detail the behavior of the dynamic contact angle in flow through capillary tubes. Our simulations revealed that our LB method reproduces the correct scaling of the dynamic contact angle with respect to velocity, viscosity, and surface tension, without specification of an artificial slip length. Further study allowed us to identify the microscopic origin of the dynamic contact angle in LB methods. These results serve to delineate the range of applicability of multiphase LB methods to flows through complex geometries.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge, MA
- Sponsoring Organization:
- USDOE - Office of Science (SC)
- DOE Contract Number:
- FG07-02ER63490
- OSTI ID:
- 896229
- Report Number(s):
- DOE/FE/63490-2; EMSP 88516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comprehensive study of the interactions between the critical dimensionless numbers associated with multiphase flow in 3D porous media
Multiphase Flow in Complex Fracture Apertures Under a Wide Range of Flow Conditions